Thomas Kunz
Systems and Computer Engineering
12
CDPD: Architecture
MDBS
IS
MD-IS
M-ES
MDBS
IS
MD-IS
M-ES
IS
A interface
(Air)
I interface
(Interservice provider)
A interface
(Air)
E interface
(External)
External
network
Physical layer
control
Data link control
Mobile home function
(MHF)
Mobile serving function
(MSF)
Directory server
Accounting server
Network management
Message transfer
server
Authentication service
Service
Provider X
Service
Provider Y
M-ES: mobile end system
IS: intermediate system
MD-IS: mobile data intermediate
system
MDBS: mobile database station
